Step-by-step explanation:
Answer:
1- 
2- 1
3- -2
Step-by-step explanation:
1-
Add the numbers : 
Reduce the fraction with 5 :
Solution :
2-
Calculate the difference: 
Divide: 1
Solution: 1
3-
Subtract the numbers: 
Reduce the fraction : -2
Solution: -2
The length side AB is 64 ft , Option D is the correct answer.
<h3>What is a Right triangle ?</h3>
A triangle that has one angle 90 degree is called Right angled Triangle.
From the figure it can be seen that
The triangle CDE is a right Triangle
Applying Pythagoras theorem to find the length of CE
CE² = 12² + 16²
CE = 20 ft
As both the triangles are similar therefore the ratio of the sides will be equal
BC : CD = AC : CE
48 / 12 = AC / 20
AC = 80ft
As Triangle ABC is also a right angled triangle
Applying Pythagoras theorem to find the length of AB
AC² = BC² +AB²
6400 = 48² +AB²
AB² = 4096
AB = 64 ft
Therefore Option D is the correct answer.
To know more about Right Triangle
brainly.com/question/6322314
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Answer:
B
Step-by-step explanation:
It is complex conjunction
The number is 7 because of the transitive property of addition
